Question

Answer the following questions.
1. Why did early man carry load on his back?
2. How was the wheel invented?
3. Name the means of transport used in the desert.
4. What is a pulley? How does it help us?
5. Write four uses of the wheel.​

Answer 1

◾ Early man carried load on his back because he was not having any transport facility or mean of transport.

◾ The wheel was invented accidentally while cutting the Wooden log ( It is just concentration no one knows correctly)

◾ Camel's are the means used in desert.

◾ Pulley is Machinical gadget which is used to reduce the friction while pulling something.

◾1. used in cars.

2. used to reduce friction.

3. used to reduce loss of energy In rolling friction.

4. wheels are used in every machine which perform circular motion.

hope it helps...